Honeywell SLG 700 User Manual page 116

Figure 26: Adjusting the Gain (Amplitude) Parameter
13. Next, go to Monitor and read a full echo curve. Check that the correct Reference,
Surface and Interface measurements were found.
14. If the algorithm is still not finding a match then the models other parameters, Width
and Attenuation, can be adjusted to get an even closer match between the model
and the curve. Note that it may be necessary to collect echo curves with various
levels of product to ensure that the reflection model provides a good match through
the full range.
parameters optimized to give and Object Function reading of 0.177.
Figure 27: Adjusting the Width and Attenuation Parameters
In two liquid non-flooded applications, when the upper product thickness drops below 15cm
approximately, the surface and interface reflections start to overlap. The transmitter will
continue to measure the upper product thickness accurately down to 7cm in spite of the fact
that the echo curve might only show one reflection for both surface and interface. If the
transmitter fails to measure thicknesses below 15cm or if the measurement of thin interfaces
Page 108
Figure 27 shows the example with the Gain, Width and Attenuation
SLG 700 Series HART Option User's Manual
Revision 5